makivic614 0 Posted July 31, 2017 Share Posted July 31, 2017 I am trying to create a manual demonstration circuit for a 74HC595 (here is the datesheet of 74HC595)shift register. Se my circuit below. The problem I am having is that I am only getting a +0.7V signal to the data, clock, and latch pins of the 74HC595 when one of the buttons are pushed. The S4 RESET switch works fine (normally high at 5V, press switch to bring down to 0V), however S1, S2, and S3 do not accomplish the reverse scenario (normally LOW, press switch for HIGH) correctly. You will note that I am also trying to debounce the switching with a capacity or resistor. I suspect this debouncing set up is creating my problem. Does anybody have any advice on how to create a debounced normally LOW, momentarily HIGH switch that switches between 0V and 5V? Quote Link to post Share on other sites
dubnet 238 Posted July 31, 2017 Share Posted July 31, 2017 Your circuit diagram didn't post. Given your symptoms the diagram will be very helpful in trying to understand the problem. Quote Link to post Share on other sites
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